{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-38727", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.033Z", "datePublished": "2025-09-04T15:33:25.286Z", "dateUpdated": "2025-09-29T05:56:53.644Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-29T05:56:53.644Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: avoid infinite retry looping in netlink_unicast()\n\nnetlink_attachskb() checks for the socket's read memory allocation\nconstraints. Firstly, it has:\n\n rmem < READ_ONCE(sk->sk_rcvbuf)\n\nto check if the just increased rmem value fits into the socket's receive\nbuffer. If not, it proceeds and tries to wait for the memory under:\n\n rmem + skb->truesize > READ_ONCE(sk->sk_rcvbuf)\n\nThe checks don't cover the case when skb->truesize + sk->sk_rmem_alloc is\nequal to sk->sk_rcvbuf. Thus the function neither successfully accepts\nthese conditions, nor manages to reschedule the task - and is called in\nretry loop for indefinite time which is caught as:\n\n rcu: INFO: rcu_sched self-detected stall on CPU\n rcu: 0-....: (25999 ticks this GP) idle=ef2/1/0x4000000000000000 softirq=262269/262269 fqs=6212\n (t=26000 jiffies g=230833 q=259957)\n NMI backtrace for cpu 0\n CPU: 0 PID: 22 Comm: kauditd Not tainted 5.10.240 #68\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc42 04/01/2014\n Call Trace:\n <IRQ>\n dump_stack lib/dump_stack.c:120\n nmi_cpu_backtrace.cold lib/nmi_backtrace.c:105\n nmi_trigger_cpumask_backtrace lib/nmi_backtrace.c:62\n rcu_dump_cpu_stacks kernel/rcu/tree_stall.h:335\n rcu_sched_clock_irq.cold kernel/rcu/tree.c:2590\n update_process_times kernel/time/timer.c:1953\n tick_sched_handle kernel/time/tick-sched.c:227\n tick_sched_timer kernel/time/tick-sched.c:1399\n __hrtimer_run_queues kernel/time/hrtimer.c:1652\n hrtimer_interrupt kernel/time/hrtimer.c:1717\n __sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113\n asm_call_irq_on_stack arch/x86/entry/entry_64.S:808\n </IRQ>\n\n netlink_attachskb net/netlink/af_netlink.c:1234\n netlink_unicast net/netlink/af_netlink.c:1349\n kauditd_send_queue kernel/audit.c:776\n kauditd_thread kernel/audit.c:897\n kthread kernel/kthread.c:328\n ret_from_fork arch/x86/entry/entry_64.S:304\n\nRestore the original behavior of the check which commit in Fixes\naccidentally missed when restructuring the code.\n\nFound by Linux Verification Center (linuxtesting.org)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netlink/af_netlink.c"], "versions": [{"version": "9da025150b7c14a8390fc06aea314c0a4011e82c", "lessThan": "47d49fd07f86d1f55ea1083287303d237e9e0922", "status": "affected", "versionType": "git"}, {"version": "c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98", "lessThan": "6bee383ff83352a693d03efdf27cdd80742f71b2", "status": "affected", "versionType": "git"}, {"version": "fd69af06101090eaa60b3d216ae715f9c0a58e5b", "lessThan": "f324959ad47e62e3cadaffa65d3cff790fb48529", "status": "affected", "versionType": "git"}, {"version": "76602d8e13864524382b0687dc32cd8f19164d5a", "lessThan": "d42b71a34f6b8a2d5c53df81169b03b8d8b5cf4e", "status": "affected", "versionType": "git"}, {"version": "55baecb9eb90238f60a8350660d6762046ebd3bd", "lessThan": "346c820ef5135cf062fa3473da955ef8c5fb6929", "status": "affected", "versionType": "git"}, {"version": "4b8e18af7bea92f8b7fb92d40aeae729209db250", "lessThan": "44ddd7b1ae0b7edb2c832eb16798c827a05e58f0", "status": "affected", "versionType": "git"}, {"version": "cd7ff61bfffd7000143c42bbffb85eeb792466d6", "lessThan": "78fcd69d55c5f11d7694c547eca767a1cfd38ec4", "status": "affected", "versionType": "git"}, {"version": "ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc", "lessThan": "e8edc7de688791a337c068693f22e8d8b869df71", "status": "affected", "versionType": "git"}, {"version": "ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc", "lessThan": "759dfc7d04bab1b0b86113f1164dc1fec192b859", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netlink/af_netlink.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.149", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.43", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.11", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.296", "versionEndExcluding": "5.4.297"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.240", "versionEndExcluding": "5.10.241"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.189", "versionEndExcluding": "5.15.190"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.146", "versionEndExcluding": "6.1.149"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.99", "versionEndExcluding": "6.6.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.39", "versionEndExcluding": "6.12.43"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15.7", "versionEndExcluding": "6.15.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.16.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/47d49fd07f86d1f55ea1083287303d237e9e0922"}, {"url": "https://git.kernel.org/stable/c/6bee383ff83352a693d03efdf27cdd80742f71b2"}, {"url": "https://git.kernel.org/stable/c/f324959ad47e62e3cadaffa65d3cff790fb48529"}, {"url": "https://git.kernel.org/stable/c/d42b71a34f6b8a2d5c53df81169b03b8d8b5cf4e"}, {"url": "https://git.kernel.org/stable/c/346c820ef5135cf062fa3473da955ef8c5fb6929"}, {"url": "https://git.kernel.org/stable/c/44ddd7b1ae0b7edb2c832eb16798c827a05e58f0"}, {"url": "https://git.kernel.org/stable/c/78fcd69d55c5f11d7694c547eca767a1cfd38ec4"}, {"url": "https://git.kernel.org/stable/c/e8edc7de688791a337c068693f22e8d8b869df71"}, {"url": "https://git.kernel.org/stable/c/759dfc7d04bab1b0b86113f1164dc1fec192b859"}], "title": "netlink: avoid infinite retry looping in netlink_unicast()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: avoid infinite retry looping in netlink_unicast()\n\nnetlink_attachskb() checks for the socket's read memory allocation\nconstraints. Firstly, it has:\n\n rmem < READ_ONCE(sk->sk_rcvbuf)\n\nto check if the just increased rmem value fits into the socket's receive\nbuffer. If not, it proceeds and tries to wait for the memory under:\n\n rmem + skb->truesize > READ_ONCE(sk->sk_rcvbuf)\n\nThe checks don't cover the case when skb->truesize + sk->sk_rmem_alloc is\nequal to sk->sk_rcvbuf. Thus the function neither successfully accepts\nthese conditions, nor manages to reschedule the task - and is called in\nretry loop for indefinite time which is caught as:\n\n rcu: INFO: rcu_sched self-detected stall on CPU\n rcu: 0-....: (25999 ticks this GP) idle=ef2/1/0x4000000000000000 softirq=262269/262269 fqs=6212\n (t=26000 jiffies g=230833 q=259957)\n NMI backtrace for cpu 0\n CPU: 0 PID: 22 Comm: kauditd Not tainted 5.10.240 #68\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc42 04/01/2014\n Call Trace:\n <IRQ>\n dump_stack lib/dump_stack.c:120\n nmi_cpu_backtrace.cold lib/nmi_backtrace.c:105\n nmi_trigger_cpumask_backtrace lib/nmi_backtrace.c:62\n rcu_dump_cpu_stacks kernel/rcu/tree_stall.h:335\n rcu_sched_clock_irq.cold kernel/rcu/tree.c:2590\n update_process_times kernel/time/timer.c:1953\n tick_sched_handle kernel/time/tick-sched.c:227\n tick_sched_timer kernel/time/tick-sched.c:1399\n __hrtimer_run_queues kernel/time/hrtimer.c:1652\n hrtimer_interrupt kernel/time/hrtimer.c:1717\n __sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113\n asm_call_irq_on_stack arch/x86/entry/entry_64.S:808\n </IRQ>\n\n netlink_attachskb net/netlink/af_netlink.c:1234\n netlink_unicast net/netlink/af_netlink.c:1349\n kauditd_send_queue kernel/audit.c:776\n kauditd_thread kernel/audit.c:897\n kthread kernel/kthread.c:328\n ret_from_fork arch/x86/entry/entry_64.S:304\n\nRestore the original behavior of the check which commit in Fixes\naccidentally missed when restructuring the code.\n\nFound by Linux Verification Center (linuxtesting.org)."}], "id": "CVE-2025-38727", "lastModified": "2025-09-05T17:47:24.833", "metrics": {}, "published": "2025-09-04T16:15:42.713", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/346c820ef5135cf062fa3473da955ef8c5fb6929"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/44ddd7b1ae0b7edb2c832eb16798c827a05e58f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47d49fd07f86d1f55ea1083287303d237e9e0922"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6bee383ff83352a693d03efdf27cdd80742f71b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/759dfc7d04bab1b0b86113f1164dc1fec192b859"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78fcd69d55c5f11d7694c547eca767a1cfd38ec4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d42b71a34f6b8a2d5c53df81169b03b8d8b5cf4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8edc7de688791a337c068693f22e8d8b869df71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f324959ad47e62e3cadaffa65d3cff790fb48529"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: netlink: avoid infinite retry looping in netlink_unicast()", "id": "2393167", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2393167"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-38727", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38727\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38727\nhttps://lore.kernel.org/linux-cve-announce/2025090402-CVE-2025-38727-a22c@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-05T14:02:32.875724+00:00", "updated": "2025-09-05T14:02:32.875781+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}